Instruction - operation code (opcode)

1 - About

An opcode (operation code) is the first part of an instruction that is read by the decoder to select the device (circuit) that implements the operations.

It's a unique number that identifies an operation.

Each opcode is a member of the instruction set.

3 - Name

A opcode is a digit. Assembly language gives name to opcode that are called mnemonic.

4 - Example

In a assembly format, simple opcode example

opcode 1100, 1100
# if opcode corresponds to the binary 00, it's the same as

5 - Documentation / Reference

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